<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Resizable Div Container</title>
    <meta name="description" content="可以对div进行拖动缩放大小">
    <style type="text/css">
        #container.resizable {
            width: 100%;
            height: 100%;
            -webkit-touch-callout: none;
            -webkit-user-select: none;
            -khtml-user-select: none;
            -moz-user-select: moz-none;
            -ms-user-select: none;
            user-select: none;
            position: relative;
            opacity: 0;
        }
        #container.resizable #left {
            position: absolute;
            top: 0px;
            bottom: 0px;
            left: 0px;
            right: 85%;
            overflow: hidden;
            background-color: #ccc;
        }
        #container.resizable #right {
            position: absolute;
            right: 0px;
            top: 0px;
            bottom: 0px;
            width: 85%;
            background: #fff;
            padding-left: 4px;
            overflow: hidden;
            background-color: #ddd;
        }
        #container.resizable #resizor {
            position: absolute;
            top: 50%;
            right: 85%;
            cursor: w-resize;
            background-color: #666;
            border-radius: 5px;
            margin-top: -10px;
            width: 6px;
            height: 20px;
            /*background: url('/public/static/admin/images/resize.png') repeat-y;*/
            background-size: cover;
            background-position: center;
            z-index: 99999;
        }
    </style>
</head>
<body>
<div id="container" class="resizable">
    <!-- Left side -->
    <div id="left">
        <p>左侧内容</p>
    </div>
    <div id="resizor" title="拖动我"></div>
    <!-- Right side -->
    <div id="right">
        <p>右侧内容</p>
    </div>
</div>
<script src="https://cdn.bootcss.com/jquery/2.2.4/jquery.min.js"></script>
<script type="text/javascript">
    var isResizing = false;
    var lastDownX = 0;

    $(function () {
        var container = $('#container.resizable');
        // 根据当前窗口大小设定 container 的高度
        container.css({'height': ($(window).height() - 20), 'opacity': 1});

        var left = $('#left');
        var right = $('#right');
        var resizor = $('#resizor');

        resizor.on('mousedown', function (e) {
            isResizing = true;
            lastDownX = e.clientX;
        });

        $(document).on('mousemove', function (e) {
            if (!isResizing) return true;
            var offsetRight = container.width() - (e.clientX - container.offset().left);
            // 判断左右拖动范围
            if (offsetRight < 0 || offsetRight >= container.width()) {
                isResizing = false;
                return true;
            }
            left.css('right', offsetRight);
            resizor.css('right', offsetRight);
            right.css('width', offsetRight);
        }).on('mouseup', function (e) {
            isResizing = false;
        });
    });
</script>
</body>
</html>